Search results for 'back focus' - page 762
a setting on an A50mm f/1.7
Yes, I've seen this as well. The repair is quite easy, but becarefull putting the lens back together again, because of the small parts for the contact pin and the tiny sphere for the aperture clicks. The problem is the build quality of the SMC-A F1.7 is abismal compared to the F1.4. A small piece ...
Posted by edumad on 25/03/2009 - 08:35
a setting on an A50mm f/1.7
I am pretty mechanically minded, but I must admit that I find that diagram a bit daunting! So I would basically open up the back of the lens as far as the aperture ring, find part X510 which is probably floating around loose in there, and superglue it back onto the ring? Edumad -- is your caut...
Posted by tigerita on 25/03/2009 - 08:55
a setting on an A50mm f/1.7
Edumad -- is your caution to be careful about losing the small parts? Or that they're difficult to get into place because of the size? Both! I always work over a large cake tin so if anything drops out it'll get caught (if a 1mm ball bearing meets carpet you'll never see it again). And you'...
Posted by hefty1 on 25/03/2009 - 09:40
a setting on an A50mm f/1.7
That diagram scares the bejesus out of me! For someone as talented as Hefty, he would have that lens back together before morning tea. :lol: Of course you wouldn't have to disassemble it down to the last screw, but the diagram will give you an idea of what you will need to do. I reckon it wil...
Posted by Clarky on 25/03/2009 - 12:37
a setting on an A50mm f/1.7
Both! I always work over a large cake tin so if anything drops out it'll get caught (if a 1mm ball bearing meets carpet you'll never see it again). And you'll certainly need nimble fingers (and good tweezers) to get everything back into place. Tricky sometimes but certainly not impossible. i w...
Posted by edumad on 25/03/2009 - 17:30
a setting on an A50mm f/1.7
Sorry for the late reply. Guys I have never dismantled my 1.7A, so I can't really help you. I have been meaning to but never got around to it. I just recommend if you do intend taking it apart, that you are vigilant with what comes off and how it goes back together. Thanks Tony-O for that ...
Posted by Clarky on 26/03/2009 - 08:56
a setting on an A50mm f/1.7
Where do the ball bearings go? As you move the aperture ring on a working lens you'll feel a series of "clicks" as you go from one position to the next. The underside of the ring itself (the bit you don't see when the lens is all together) has a short serrated section - where this section lines up w...
Posted by hefty1 on 26/03/2009 - 10:09
a setting on an A50mm f/1.7
Thanks Steve! My problem is clearly number 2 -- good to figure out before taking the lens apart to the those infamous plastic welds and discovering that they're both still intact! Comparing this lens to another lens with the A position (Sigma 28-200), I notice that the little button on this lens...
Posted by tigerita on 26/03/2009 - 12:50
a setting on an A50mm f/1.7
Thanks Steve! My problem is clearly number 2 -- good to figure out before taking the lens apart to the those infamous plastic welds and discovering that they're both still intact! Comparing this lens to another lens with the A position (Sigma 28-200), I notice that the little button on this lens...
Posted by stevejcoe on 26/03/2009 - 13:10
a setting on an A50mm f/1.7
My example is doing something similar. It travels freely across the whole aperture range and quite easily drops out of auto. I think there is a slight faint click as it goes into the 'A' setting, but nothing great and it quite quickly/easily moves enough for the camera to stop registering that it's ...
Posted by richandfleur on 18/04/2013 - 00:27
DA 15mm F4 Limited
Simon that was my thinking too. Sadly I don't have the money for it now. Ned Bunnel's photo are with a pre-production model. Ishpuini (who posts here occasionally has one winging it's way to Belgium from Chris. It should be waiting for him when he gets back from his weekend in NYC. So maybe n...
Posted by Gwyn on 27/03/2009 - 14:58
DA 15mm F4 Limited
Well thank you, I was hoping you would like it. BTW you can all look it up so you know I'm not telling some bogus story here, all those places are real even the fairies :) Ken that's quite a nice title but I ain't no story teller though :( God Asahi is quite a splendid one, The God of the morni...
Posted by Anvh on 28/03/2009 - 16:48
Tamron AF 70-300mm f/4.0-5.6 Di LD
I think it is a good lens, my normal kit consists of the Sigma 18-200 and the Tamron, it also works well with my i.5 Kenko converter. I find the 1:2 Macro facility very useful. The only thing I am not so keen on is the macro focus switch, which can only be engaged at 180mm and only switched back...
Posted by beakynet on 25/03/2009 - 23:25
A little help understanding k mount lenses.
I presume you are using a camera with a K mount however you say, "Is it correct to say that K lenses are normally stopped down, basically the opposite of the M42s?" which makes me wonder? Basically, here is how it works. You cannot use K mount lenses on a screw mount body. You can use M42 ...
Posted by gartmore on 27/03/2009 - 08:38
A little help understanding k mount lenses.
Hey, :lol:. No, I don't have the patience of a saint, nor do I have the eyesight required. I realized the eyesight part when all the damn cameras and lenses wouldn't focus like they used to! Well, the other eye is still good for now.:wink: Yeah, it was the lever that I needed to understand. Th...
Posted by Lars on 27/03/2009 - 14:34
A little help understanding k mount lenses.
I don't like buying body specific lenses, they need to fit a range of cameras that's why I was asking about how they work. Thankfully there's no such thing as a body specific lens in the Pentax system, unless you count the System 10 lenses for the Auto 110. The SMC-AF 35-70 F2.8 could be called bod...
Posted by Mongoose on 30/03/2009 - 12:33
Teleconverter advice
Perhaps the same issue with stop down metering and M series lenses. Why is it OK wide open, over exposed in the mid range and back to OK shut right down? And why is OK on my K 135 f/2.5 but a stop out with the Tammy? I am just glad with digital that one can check on the spot, with film I would be...
Posted by womble on 28/03/2009 - 22:38
Teleconverter advice
Hopefully a quick query... I'm thinking of purchasing a teleconverter for my airshow trips ..... I would probably be using a TC combined with a DA*300mm or a zoom lens up to 300mm. Regards Rob Hi Rob May I ask, do you use AF when you are shooting the subjects in flight or otherwis...
Posted by aminstar on 30/03/2009 - 16:03
Which tc?
Can't believe someone (from the UK) paid £257 for one of these last night on ebay The Adapter didn't have and endcap (std. body cap) and because the elements are floating they could easily get damaged. The seller had a feedback of only 14 Seems like Pentax need to get this back in production...
Posted by shim on 31/03/2009 - 09:28
Which tc?
Can't believe someone (from the UK) paid £257 for one of these last night on ebay The Adapter didn't have and endcap (std. body cap) and because the elements are floating they could easily get damaged. The seller had a feedback of only 14 Seems like Pentax need to get this back in production...
Posted by aminstar on 31/03/2009 - 10:11
